00699nam a22001817a 450000500170000000800410001702000150005805000230007324500850009625000110018126000770019230000270026949000640029650400350036065000600039570000280045570000340048320160705110451.0160705b        vau||||| |||| 00| 0 eng d  a087353342904aQA20.C34bC35 199210aCalculators in mathematics education / cJames T. Fey, Christian R. Hirsch, eds.  a1a ed.  aReston, virginia :bNational Council of Teachers of Mathematics,cc1992.  a248 paginas. :c23 cm.  aYearbook / national council of teachers of mathematics 1992  aIncluye referencias e índice 72LembaMatemáticasxEstudio y enseñanza Calculadoras1 aFey, James T., eeditor1 aHirsch, Christian R.,eeditor